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Cash Register 

CMS 140 euro / CMS 240 euro 

SERVICE MANUAL 



Code 68671 1S-I 



PREFACE 



This manual is addressed to the field engineers who will install and service the CMS 140/240 cash register. 
It provides all the information needed for a correct product maintenance. 



SUMMARY 



This manual is divided into six chapters. 

The first three chapters describe the operating, functional checks, and maintenance and repair procedures. 

Chapter 4 describes the disassembly and adjustment procedures. Chapters 5 and 6 describe the electronic 
circuitry and provide the schematics. 

The appendix holds the SPARE PARTS CATALOGUE. 



PREREQUISITES 

The topics described in this manual require knowledge of similar products. 

REFERENCE DOCUMENTATION 

Instruction Manual - (provided with the product) 

DISTRIBUTION: General 
FIRST EDITION: November 1998 
NEWSLETTER: September 1999 



68671 1S Service Manual 



CONTENTS 



1. OVERVIEW 

1.1 TECHNICAL SPECIFICATIONS ... 1-1 

2. SPECIFICATIONS AND OPERATING 
PRINCIPLES 

2.1 SPECIFICATIONS 2-1 

2.1.1 Features 2-1 

2.1.2 Specifications 2-1 

2.1.3 Mechanisms 2-2 

2.2 OPERATING PRINCIPLES 2-3 

2.2.1 Transmission/SelectMechanism 2-3 

2.2.2 Detector Mechanism 2-6 

2.2.3 Printing Mechanism 2-7 

2.2.4. Inking Mechanism 2-9 

2.2.5 Paper Feeding Mechanism 2-9 

2.2.6 Printer Operation During One Print 
Cycle Initialization 2-10 

3. HANDLING, MAINTENANCE, AND 
REPAIR 

3.1 HANDLING THE PRINTER 3-1 

3.1.1 Precautions on Printer 

Handling 3-1 

3.1.2 Paper Setting 3-1 

3.1.3 Installating the Ink Roll Assembly 3-2 

3.2 MAINTENANCE 3-2 

3.2.1 Cleaning 3-2 

3.2.2 Inspection 3-2 

3.3 APPLICATION OF LUBRICANTS . 3-4 

3.3.1 Lubricant Types 3-4 

3.3.2 Lubricating Requirements 3-4 

3.3.3 Lubrication Points 3-4 

3.4 TOOLS AND LUBRICANTS 3-5 

3.4.1 List of Tools 3-5 

3.4.2 List of Lubricants 3-5 

3.5 REPAIR 3-5 

3.5.1 Repair Levels 3-5 

3.5.2 Repair Procedures 3-5 

3.5.3 Repair Guidelines 3-6 



4. ASSEMBLY AND DISASSEMBLY 

4.1 GENERAL 4-1 

4.2 MACHINE DISASSEMBLY - 
REASSEMBLY 4-2 

4.2.1 Machine Case 4-2 

4.2.2 Printer Unit 4-2 

4.2.3 Main Board and Display 4-3 

4.2.4 Paper Feed Motor 4-3 

4.2.5 Power Supply 4-4 

4.2.6 Keypad 4-4 

4.3 PRINTER DISASSEMBLY - 
REASSEMBLY 4-5 

4.3.1 Ink Roller 4-5 

4.3.2 Electrical Connections 4-6 

4.3.3 Return Spring 4-7 

4.3.4 Snap Ring 4-7 

4.3.5 Gear 4-8 

4.3.6 Motor 4-10 

4.3.7 Detection Wheel 4-11 

4.3.8 Platen Assembly Removal 4-12 

4.3.9 Printer Carriage 4-13 

4.3.10 Printer Carriage 4-14 

4.3.11 Machine Case 4-16 

5. CIRCUITRY 

5.1 GENERAL 5-1 

5.1.1 Block Diagram 5-1 

5.2 POWER SUPPLY CIRCUIT 5-2 

5.3 TRANSFORMER WIRING DIAGRAM 5-3 

5.4 POWER SUPPLY SPECIFICATIONS 5-3 

5.5 RESET CIRCUIT 5-4 

5.6 POWER FAIL CIRCUIT 5-4 

5.7 DISPLAY CIRCUIT 5-5 

5.8 DISPLAY TUBE INFORMATION .. 5-6 

5.9 KEYBOARD CIRCUIT 5-7 

5.10 PRINTER CIRCUIT 5-8 

5.11 DRAWER CIRCUIT 5-9 

5.12 BATTERY CIRCUIT 5-9 

5.13 BUZZER CIRCUIT 5-9 

6. SCHEMATIC AND DIAGRAM 6-1 

SPARE PARTS CATALOGUE A-1 



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Service Manual 



1. OVERVIEW 




Fig. 1-1 



1.1 TECHNICAL SPECIFICATIONS 
Type: 



Display: 

Capacity: 

Printer: 

Paper supply: 

Memory battery protection: 

Technology: 

Voltage: 

Power consumption: 

Operating temperature: 

Dimensions: 

Weight: 



Electronic cash register with printer and eight 
departments 

Fluorescent display, symbols for error, change, 
minus, total and program mode 

Input 7 digits and readout 

Serial printer with ink roller 

57-mm single ply register tape 

Approx. 3 months after power interruption via 
4 AA batteries 

CMOS RAM 

220-240V 50/60 Hz ~ 1 1 5V 50/60 Hz 

0.07A; operating 0.22A 

0°to40°C 

Depth 425 mm, width 324 mm, height 220 mm 

Approx. 6 kg 



686711 S 



Service Manual 



1-1. 



2. SPECIFICATIONS AND 
OPERATING PRINCIPLES 

2.1 SPECIFICATIONS 

2.1.1 Features 

The Micro Printer was designed and developed as a 
printer for use with calculators. It offers the following 
features: 

• Ultra-compact and lightweight design. 

• Use of movable type for sharp printing quality. 

• High printing speed due to a carriage return 
mechanism that can return the carriage from any 
column position. 

• Silent operation and printing. 

• Provided with quick feeding and paper free 
functions. 

• Use of ordinary calculator paper. 

• Requires no control of the motor speed. 

2.1.2 Specifications 

The main specifications are listed as follows. 

Print method 

Type-printing serial printing 

Carriage width 

Max. 19 printable columns (including one column of 
symbols) 

Character position 

On symbol column side: 13 positions +1 empty 

positions 

On numeric column side: 14 positions 

Character size 

1.6 (W)x2.5 (H) mm 

Intercharacter intervals 

Between numerics: 2.1 mm 

Between a numeric and symbol: 2.6 mm 

Line spacing: 4.6 mm 

Print speed 

Average printing speed at 6.0 VDC 
19-column printing: TYP 0.9 l/s 
7-column printing: TYP 2.2 l/s 



Paper (Supplied by the user) 

Type: Regular paper 
Size: Width 57.5 mm +/- 0.5 mm 
Roll diam.: 80 mm or less 
Thickness: 0.06 - 0.085 mm 
Average weight: 47 g/m 2 - 64 g/m 2 

(40 - 55 kg/1 000 sheets/1 091 x 

788 mm) 

Paper feed 

TYP 8 Ips. Fast paper feeding is also possible and a 
paper release mechanism is provided. 

Inking 

Ink roll method 

Colors : Purple or black 

Ink roll life: Purple 1 ,000,000 characters 

Black 350,000 characters 
Standard: IR-40 

Motor 

Terminal voltage: 6.0 +0.5 -2.0 VDC 
Average current: Approx. 0.25 A (during 1 9 
columns 7 character shift 
printing at 6.0 VDC, 25 °C) 

Detector 

Mechanical point of contact 

Reset signal "R", Timing signal "T", and a Sub-Timing 

signal "t" 

D.O resistance: Approx. 20 Ohm +/- 2 ohm (at 25 °C) 

Connection method 

Jumper Wire on printer side 

Guaranteed operating temperature 

< C-50° 

External dimensions 

86(W)x58.4 (D)x 19(H) mm 

Weight 

Approx. 90 g. 



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Service Manual 



2-1 



2.1.3 Mechanisms 

This printer consists of two print wheels, a hammer, 
and a carriage equipped with an ink roll. It is a serial 
printer with movable type, and performs printing by 
sequentially moving across from the lowest-order 
column. 

When the motor is activated, the gear trains rotate 
and cause the print wheels and detection wheel to 
rotate. When the trigger coil is charged according to a 
signal (which corresponds to a character) output from 
the detector, character selection is performed, the print 
wheel stops, the print gear is rotated by the action of 
the planet gear, a character is printed then the carriage 
shifts to the next column (column-shift operation). 



When the charge to the trigger coil is lengthened 
during character selection performed at the end of 
line, printing is performed then the carriage is returned 
to the initial column and the paper is fed forward, 
thereby completing the printing of one line. 

This printer consists of five mechanisms: the 
transmission and selective mechanism, detection 
mechanism, print mechanism, inking mechanism, and 
paper feeding mechanism. 

Fig. 2-1 shows an external view of the Micro Serial 
Printer. For details on the operating principles and 
handling of each mechanism, see section 2.2, 
"OPERATING PRINCIPLES", and Chapter 3, 
"HANDLING, MAINTENANCE, AND REPAIR". 




Fig. 2-1 Exterior View 



2-2 



Service Manual 



68671 OD 



2.2 OPERATING PRINCIPLES 

2.2.1 Transmission/Select Mechanism 

As shown in Fig. 2-2, this mechanism consists of the 
reduction gear train, selective mechanism, print gear 
train, and paper feed gear train. 





(T) Motor drive signal input | 


" i 


(2) Motor rotates | 


1 ' i 


(3) Motor gear rotates | 


v 1 


@ Reduction gear rotates 







(1) Reduction gear train 



(5) Planet gear rotates 



I 



Selective drive gear rotates 



Released 



(7) Selective gear rotates 
i 



-i T 



' I Locked 
i i l 



(3) Print gear train 



i r 



Locked(selected) 



Paper feed ratchet wheel rotates 



I 



) Released + 



I 



) Released 



Paper feed pawl operates 



i Locked 

I 
T 

Paper feed drive gear rotates 

i 

I 
T 

Paper feed transmission gear rotates 



I 

I 

■1" 



Selective pawl operates "z-~-"Z." 
+ @ Released 

I 

Trigger lever operates 



■r- 




Trigger plate operates 

I 

Trigger plate is drawn 

I 
I 



Trigger Coil Drive signal input 



) Print changeover rotates 
i 

J 

| | @ Print gear rotates 

i 
To print mechanism 



(2) Selective mechanism 



Paper feed drive rotates 



(4) Paper feed gear train 



T 

T 



To paper feed mechanism 



Fig. 2-2 Transmission/Select Mechanism 



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Service Manual 



2-3 



Reduction gear series (See Figs. 2-2 and 2-3.) 
The reduction gear train consists of the motor gear, 
reduction gear, planet gear, selective drive gear, 
selective gear assembly, selective pawl, and print 
changeover cam. When the motor rotates 2, the 
rotation force is sequentially reduced from the motor 
gear 3 on the same shaft through the gear train to the 
selective gear assembly 7. 



The rotation of the print changeover cam is locked by 
the action of the selective pawl, so the paper feed 
ratchet wheel 8 on the same shaft as the selective 
gear assembly, the print wheel, and detection wheel 
also rotate at the same time. 



Print changeover cam 




fT) Selective drive gear 

Motor gear 




Planet 



Reduction gear 



Selective gear assy 




Selective gear assy 



Motor gear 



Reduction gear 
Selective pawl P | ane1 gear 

Selective drive gear 
Print changeover cam 



Fig. 2-3 Reduction Gear Series 



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Service Manual 



68671 OD 



Select mechanism (See Figs. 2-2 and 2-4.) 
As shown in Fig. 1-4, the select mechanism consists 
of the selective gear assembly, trigger coil, trigger 
plate, and selective pawl. During rotation of the 
reduction gear series, when a Drive signal is input 9 
to the trigger coil in conformance with the Timing signal 
output from the detector, the trigger plate is drawn 10 
to the yoke fixed onto the selective gear assembly so 
that the trigger plate 1 1 , trigger lever 12, and selective 
pawl 13 rotate together with the rotation of the selective 
gear assembly. At the same time as the print 
changeover cam is unlocked, the selective pawl locks 
15 the tooth section corresponding to the character 
of the selective gear assembly. When the selective 
gear assembly is stopped, the print wheel mounted 
on the same shaft is stopped also, and character 
selection is performed. 



Print gear series (See Figs. 2-2 and 2-4.) 
The print gear series consists of the print changeover 
cam and print gear. When the selective gear assembly 
is stopped by the select mechanism, the interlocked 
selective drive gear is also stopped. At the same time, 
the unlocked 14 print changeover cam is coupled and 
is rotated 16 by the planet gear of the rotating reduction 
gear series. The print gear thus rotates 17 which is 
transmitted to the printing mechanism. 



Printing 




Trigger coil 
Selective gear assy 



Selective gear ass y 

Trigger lever 
Trigger plate 

Trigger coil 



Print gear 
\Print changeover cam 

(gear section) 




®* r®'""- i - , '' ( $ 



Selective pawl 



Fig. 2-4 Select Mechanism and Print Gear Series 



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Service Manual 



2-5 



Paper feeding gear series (See Figs. 2-2 and 2-5.) 
As shown in Fig. 2-5, the paper feeding gear series 
consists of the paper feed ratchet wheel, paper feed 
drive gear assembly, paper feed transmission gear, 
and paper feed gear. 

During column selection or consecutive paper feeding, 
although the select mechanism and printing gear 
series will operate through lengthening the Trigger Coil 
Drive signal at the first column during space selection, 
the return lever and trigger lever are in the unlocked 
status 18 in order to maintain a long operating status 
of trigger plate and trigger lever. 
When the print changeover cam rotates, because the 
cam controlling the return lever reaches a notched 
section, the return lever is released and begins 
operating 19 due to spring force, and its interlocking 
with the paper feed ratchet in the paper feed drive 
gear assembly is cancelled 20. 

Selective gear assembly 

\ ^ 
Paper feed 

transmission gear 



The paper feed ratchet operates 21 due to spring force, 
and meshes with the teeth of the paper feed ratchet 
wheel which is on the same shaft as the selective gear. 
When the printing operation is completed, the print 
changeover cam causes the selective pawl to return 
to its pre-selection status, and the print changeover 
cam is stopped. When the selection gear begins 
rotation, the paper feed driver gear assembly 22, paper 
feed transmission gear 23 and paper feed gear 24 all 
rotate together with the paper feed ratchet wheel, which 
is transmitted to the paper feeding mechanism. 



per feed ratchet wheel 
Trigger lever 




Paper feed gear / ^ 

PaDer feed rachet 
Fig. 2-5 Paper Feeding Gear Series 



Return lever Print changeover cam 
(cam section) 



2.2.2 Detector Mechanism 

(See Fig. 2-6.) 

The detector mechanism consists of the detector 

assembly and the detector gear. The detector employs 

a mechanical contact-point system and generates a 

Timing signal "T" and Sub-Timing signal "t" in 

correspondence to each character position on the print 

wheel. 

Timing signal T -j 
Sub-Timing signal t 
Reset signal Ft 
Timing pulse TP 



The detector also generates a signal Reset signal at 
each rotation of the print wheel. Waveform rectification 
of these signals is to be performed by the user to use 
as Timing pulses or Reset pulses. 



JWTL 



JOL 



jiniL 



jpt 



imnnnAli 



Reset pulse RP 




To- 

R< 

Co- 



to- 



Detection wheel 



Fig. 2-6 Detector Mechanism 



2-6 



Service Manual 



68671 0D 



2.2.3 Printing Mechanism 

The printing mechanism performs two functions: the 
printing operation and carrying operation. 

Printing operation (See Fig. 2-7.) 
When the print gear series (see subsection 2.2.1, 
Transmission/Select Mechanism) causes the print 
shaft and print cam to rotate in the -i arrow 1 and 2 
directions, the hammer transmission lever assembly 
and hammer rotates in the -i arrow 3 and 4 directions; 
therefore, the print wheel is pressed in the -> arrow 5 
direction by the hammer, and printing is performed. 



The hammer return spring moderates the pressure of 
printing and also functions to restore the hammer and 
hammer transmission lever assembly to standby 
status at the completion of printing. The print wheel, 
similar to the print changeover cam, makes one 
rotation with each printing operation, and the printing 
operation is performed during the first half of the 
rotation. 



Hammer spring 
Print cam / Print shaft 




Hammer 
Print wheel 



Hammer transmission 
ever assy 



Hammer return spring 



Print wheel shaft 



Fig. 2-7 Printing Operation 



68671 OD 



Service Manual 



2-7 



Carrying operation (See Fig. 2-8.) 
The carrying operation is performed after the printing 
operation during the last half of the print shaft rotation. 
As soon as the positioning plate causes the print gear 
to begin rotating, the cam section of the print gear 
causes its meshing with the return lever to be 
unlocked, and the print gear meshes with the print 
cam. 



When the print shaft rotates in the -> arrow 1 direction, 
the meshing between the teeth of the print cam and 
positioning plate causes the print shaft to slide to the 
-i arrow 2 direction while rotating in the -> direction 
while in the -> arrow 3 direction. Simultaneously with 
this sliding action, the carrying operation of the 
carriage unit is performed (-■ arrow 4). 



Teeth of print cam p Hnt cam 

Carriage unit 



Teeth of positioning 



Print shaft 




Positioning plate 



V — J Hammer 



Print wheel assembly 



Fig. 2-8 Carrying Operation 



2-8 



Service Manual 



68671 OD 



2.2.4 Inking Mechanism 

(See Fig. 2-9.) 

The ink roll assembly is constantly pressed lightly 

against the outer periphery of the print wheel due to 

the operation of the ink roll spring. 

When the print wheel rotates, the ink roll also rotates 

and the ink is supplied. 

2.2.5 Paper Feeding Mechanism 

The paper feeding mechanism performs two functions: 
the carriage return operation and the paper feeding 
operation. 




Carriage return operation (See Fig. 2-10.) 
The paper feeding gear series (see subsection 2.2.1 , 
"Transmission/Select Mechanism") causes the return 
lever to drop into the cam section of the print change- 
over cam so that it meshes with the positioning plate 
(-■ arrows 1 and 2). The rotation of the print 
changeover cam restores the return lever to its original 
position (-■ arrow 3) and rotates the positioning plate 
with which it is meshed (-> arrow 4). As a result, the 
teeth of the positioning plate and print cam become 
disengaged (5), and the spring force of the print wheel 
spring and carriage spring causes the carriage to be 
returned (-■ arrow 6). 



To mount or remove 



Ink roll spring 



Carriage 



Ink roll 



Print wheel 



Fig. 2-9 Inking Mechanism 




Carriage 

Print cam 

Positioning plate 

Return lever 
Carriage spring 

Print cam 

/ Positioning plate 




\ 



Return lever 



Carriage Print wheel spring 



Fig. 2-10 Carriage Return Operation 



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Service Manual 



2-9 



Paper feeding operation (See Fig. 2-1 1 .) 
Paper feeding is executed while the paper feed drive 
gear assembly performs one rotation. When the paper 
feeding gear series (see subsection 2.2.1, 
"Transmission/Select Mechanism") causes the paper 
feed gear to rotate in the -■ arrow 1 direction, the paper 
feed rubber within the platen also rotates in the -■ 
arrow 2 direction, and the paper is fed by friction from 



the paper hold roller, which is in contact with the paper 
feed rubber. 

When the paper feed ratchet within the paper feed 
drive gear assembly strikes the return lever, it 
becomes disengaged with the paper feed ratchet 
wheel, the rotation of the paper feed drive gear 
assembly is stopped, and paper feeding is terminated. 



Paper 



Paper feed gear 



Paper feed roller 




Platen 



Paper guide 



Paper hold roller 



Fig. 2-1 1 Paper Feeding Operation 



2.2.6 Printer Operation During One Print 
Cycle Initialization 

To confirm that the carriage is in standby status (at 
the first column), initialization must be performed prior 
to printing and paper feeding. Initialization is completed 
performing line feed. 

Printing of the first line 

1 The Timing pulses "TP" are counted after the 
Motor Drive signal is applied and the motor is 
activated. The Reset pulse "RP" appearing 8 Timing 
pulses shall be regarded as "RPo" and the first 
Timing pulse "TP" after the rising of "RPo" shall be 
regarded as "TPo". 

2 Character selection (First column) 

The Trigger Coil drive pulse is applied to the trigger 
coil during the interval from Timing pulse "TPn" to 
"TPn+1" which correspond to the desired character. 
At such time, the Timing pulse interval ("TPn" to 
"TPn+1") is measured to obtain "TW1". Following 
character selection, the print wheel stops (the 
timing pulse retains the "TPn+1" status), then print 
and carrying are automatically executed. 

3 Character selection (second column) 

The print wheel starts rotating again and the first 
Timing pulse is TP1 2. Character selection can be 
performed from the next Timing pulse TP13. The 
restofthischaracterselection operation is identical 
to that described in Step (2) above. 



4 Carriage return and paper feeding 

During character selection for the highest-order 
column of a line of print, printing, carriage return, 
and paper feed are performed by adding: [the 
width of the drive pulse to the trigger coil] + [the 
timing pulse interval TW2 (TPn to TPn+1) at the 
time] + [(the TP interval TW1 measured during 
selection of the 1st column) x 6]. 

5 Motor OFF 

After completing the printing of the highest-order 
printing is one line of printing, the print wheel 
begins rotation and the Timing pulse "TP" is 
generated. Counting from this initial rising pulse, 
the Motor Drive signal is cut off at the rising of the 
fourteenth Timing pulse "TP". 

NOTES: 

• During a one-line print cycle, confirm the Reset 
pulse "RP" between Timing pulses "TP13" and 
"TPo" or "TPo" and "TPi". 

• The first Timing pulse that is generated after the 
print column-shift process (TPn"2) cannot be used 
for character selection. 



2-10 



Service Manual 



68671 0D 



Consecutive printing 

1 The process for the initial line is similar to that for 
"Printing of the first line". 

2 Printing of the second and later lines begins as 
follows: Aftercompleting the printing of the highest- 
order column for printing of the first line, with the 
motor remaining driven, count the following Timing 
pulses "TP". From the rising of the 29th Timing 
pulse, pinting of the first column of the second line 
becomes possible. Next, follow Steps 2 to 4 of 
"Printing of the first line". 

3 Consecutive printing is performed by repeating 
Step 2 above. 

4 Motor OFF 

Perform Step 5 of "Printing of the first line". 

Paper feeding of the first line 

1 The Timing pulses "TP" are counted after the 
Motor Drive signal is applied and the motor is 
activated. The Reset pulse "RP" appearing 8 
Timing pulses shall be regarded as "RPo" and the 
first Timing pulse "TP" after the rising of "RPo" 
shall be regarded as "TPo". 

2 Paper feeding 

Select the empty character "TP10". At such time, 
measure the Timing pulse interval "TP10" to "TP11" 
to obtain TW1 . When the width of the Trigger Coil 
Drive pulse equals the measured "TW1" plus six 
times "TW1", the empty character on the print 
wheel is selected and paper feeding is performed. 

3 Motor OFF 

After completing the paper feeding of one line, the 
print wheel begins rotation. Counting from the 
initial rising Timing pulse, the Motor Drive signal is 
cut off at the rising of the fourteenth Timing pulse 
"TP". 

NOTE: 

• During a one-line print cycle, confirm the Reset 
pulse "RP" between Timing pulse "TP13" and 
"TPo" or "TPo" and "TPi". 



Fast paper feeding 

1 The process for feeding the initial line is similar to 
that for "Paper feeding of the first line". 

2 Paper feeding of the second and later lines begins 
as follows: After completing the paper feeding of 
the first line, with the motor remaining driven, 
count the following Timing pulses "TP". From the 
rising of the 21st Timing pulse, selection of the 
empty character "TP10" becomes possible. Next, 
follow Step 2 of "Paper feeding of the first line". 

3 Fast paper feeding is performed by repeating Step 
2 above. 

4 Motor OFF 

Perform step 3 of "Paper feeding of the first line". 



68671 OD 



Service Manual 



2-11. 



3. HANDLING, MAINTENANCE, AND 
REPAIR 

3.1 HANDLING THE PRINTER 

3.1.1 Precautions on Printer Handling 

Precautions on transport (See Fig. 3-1 .) 

(1) When transporting this printer, never carry it by 
grasping only the jumper lead. 

(2) Never expose the printer to impact by dropping or 
striking it, placing two printers into contact or 
similar means. 




Fig. 3- 1 Proper Handling of Printer 

Precautions on storage 

• Avoid storage in locations exposed to excessive 
dirt or dust, direct sunlight or excessive moisture. 

• In the case of long-term storage (over 1 month), 
place the printer a polyethylene bag after wrapping 
it in anti-rust (VPI) paper, then store it in a dry 
location. 

Precautions on use 

• Since this printer employs a permanent magnet 
(motor section), avoid using it in locations exposed 
to excessive iron filings, dirt, dust or other foreign 
particles. 

• Never perform a printing operation without the 
paper and ink roller installed. 

• Make sur you use only the paper and ink roll 
assembly that are stipulated in the specifications. 

• The ink roll assembly is a disposable part; do not 
attempt to refil its ink supply. 



3.1.2 Paper Setting 

Loading the Paper 

When loading the paper into the printer, note the 
following points. 

Paper Setting Procedures (See Fig. 3-2.) 





Printer 



O X 

Fig. 3-2 Paper Setting Procedures 

The Leading Edge of Rolled Paper (See Fig. 3-3.) 



O x 

Fig. 3-3 The Leading Edge or Rolled Paper 



Precautions on paper insertion 

• Insert the paper straight into the paper entrance 
section. Never insert paper having an uneven 
leading edge at a slant. 

• If the paper is pushed in the direction of feeding, 
paper insertion will be simplified. 

Removing the Paper 

Remove the paper by following on the two methods 
below. 

• Perform paper feed using an electrical operation 
(switch the printer power to ON, then press the 
Paper Feed button), then remove the paper. 

• Although the paper release mechanism in standby 
status allows the paper to be freely removed by 
pulling it out towards the front or back, make sure 
to pull it straight out of the printer. Pulling the 
leading edge out at a slant causes paper 
jamming. 



68671 OD 



Service Manual 



3-1 



3.1.3 Installating the Ink Roll Assembly 



3.2 MAINTENANCE 



Fiting the Ink Roll Assembly (See Fig. 3-4.) 

• Set the ink roll assembly in the cutout sections of 

the carriage, then press it down gently until it clicks 

into place. 



Ink roll ass'y 



! Cutout section 
/ 





Carriage 



Fig. 3-4 Installation of Ink Roll Assembly 

Replacement of ink roller assembly 

(See Fig. 3-5.) 

• Press the knob of the ink roll assembly in the -> 

arrow direction, then lift the ink roll assembly up 

and out of the carriage. 




To ensure this printer retains its initial performance 
level throughout a long product life, and to prevent 
potential troubles, be sure to perform maintenance 
and management according to the points described 
in the following subsections. 



3.2.1 Cleaning 

Eliminating dirt or stains 

Wipe off the soiled sections using alcohol or benzene. 

Eliminating dust, scraps, and other foreign 
particles 

Use a vacuum cleaner to carefully draw out all foreign 
particles from every part of the printer. 

NOTES: 

Never use thinner, tricholyene nor ketone solvents as 
they may deteriorate or damage the plastic parts. 
Check the remaining lubricant of each cleaned section 
and perform lubrication as required. (See subsection 
3.3.3, "Lubrication Points".) 



3.2.2 Inspection 

The maintenance and check-up procedures for this 
printer are grouped into two types: 

1) Daily checks that can be easily performed by the 
operator of the printer during the course of daily 
work, and 

2) Periodic checks that can be performed only by 
persons having a thorough understanding of the 
printer mechanisms. These maintenance and 
check procedures should be implemented 
according to the technical level of the person 
conducting them. 



Fig. 3-5 Replacement of Ink Roller Assembly 



3-2 



Service Manual 



68671 OD 



Periodic Check 

Every six months, periodic maintenance and inspection 
of the points below should be conducted: 



Check Item 


Standard 


Repair Method 


Adhesion/penetration 
of dirt, paper scraps, 
or dust to the printer 
interior. 


• No excessive adhesion 
of dirt, paper scraps or 
dust. 


• Use a vacuum 
cleaner to carefully 
remove all foreign 
matter from the 
printer. 


Shape of the springs. 


• No deformed springs. 


• Replace any 
deformed springs. 


Lubrication status. 


• See subsection 3.3.1, 
"Lubrication 
Requirements". 


• See subsection 
3.3.3, "Lubrication 
Points". 


Printing and paper 
feeding. 


• Nodefectsintheprinted 
results. 

• No defects in the paper 
feeding. 

• Observe each function 
and confirm the 
absence of worn or 
deformed parts, paper 
jams, and other defects. 


• See subsection 
3.5.3, "Repair 
Guidelines". 



Daily check 

The printer and printer operation are checked to see 
if the printer is being operated in the proper manner 
and if it is being maintained in optimum condition. 

If any unsatisfactory points are discovered, they should 
be remedied. 

• Check that the ink roller ass'y is securely installed 
in the carriage. 

• Check the ink roller in use conforms to the 
specifications (IR-40). Check the ink roller for 
damage, replacing the ink roller if the ink roller 
status is affecting printing quality. 



68671 OD 



Service Manual 



3-3 



3.3 APPLICATION OF LUBRICANTS 



3.3.2 Lubricating Requirements 



Lubrication plays an important role in maintaining this 
printer at its initial performance level throughout a long 
product life as well as preventing potential troubles. 
Make sure to apply the specified lubrificants in the 
appropriate amounts at the specified intervals. 



3.3.1 Lubricant Types 

The type of oil used greatly influenoes performance 
and durability, and special attention is required to its 
low temperature characteristics. Consequently, the oils 
to be used with this printer are specified by us on the 
basis of the results of the thorough analyses of data 
for many types of oils and various experiments. 

Note that our specified oils are available in 40cc (gm) 
containers (minimum supply unit). 
The three types of oils to be use with this printer are: 
G-20, G-34 and 0-3. 



Prior to lubricating a part during assembly or 
disassembly, that part must be thoroughly cleaned. 
The points requiring lubrification and the 
corresponding lubricant types are listed in subsection 
3.3.3, "Lubrication Points", and shown in Fig. 4-2, 
"Lubrication Points" (Note that corresponding numbers 
are used in the table and figure). 
Lubrication should be periodically performed after 
every six months, every overhaul, or every 700,000 
printed lines. If lubrication becomes deficient due to 
cleaning, disassembly or parts replacement, be sure 
to perform lubrication regardless of the actual 
lubrication interval. 



3.3.3 Lubrication Points 

(See also Fig. 4-2) 

* (1), (2), (3), (11), (12) and (13) require lubrication 

during assembly. 



No. 


Lubrication Point 


Oil Type 


(1) 


Flanged section of paper feeding ratchet wheel 
(contact point between frame and teeth). 


G-34 


(2) 


Contact point of detection wheel with frame. 


G-34 


(3) 


Contact point between selective gear ass'y and trigger 
plate. 


0-3 


(4) 


Contact point between print shaft and frame (2 points). 


0-3 


(5) 


Outer surface of print shaft. 


0-3 


(6) 


Outer surface of print wheel shaft. 


0-3 


(7) 


Contact point between print cam and hammer spring. 


G-34 


(8) 


Teeth of positioning plate (3 points from the T side). 


0-3 


(9) 


Contact point of positioning shaft with frame and 
return lever (3 points). 


0-3 


(10) 


Print gear cam. 


0-3 


(11) 


Planet gear (teeth and shaft entrance section) (2 
points). 


0-3 


(12) 


Contact point of the selective drive gear with the 
reduction gear. 


0-3 


(13) 


Entire outer surface of detection wheel. 


G-20 


(14) 


Contact point of selective pawl with print changeover 
cam. 


0-3 


(15) 


Contact point between print wheel ass'y and carriage. 


0-3 


(16) 


Contact point between guide shaft with frame and 
carriage. 


0-3 



3-4 



Service Manual 



68671 0D 



3.4 TOOLS AND LUBRICANTS 
3.4.1 List of Tools 



Tool Designation 


Availability 


Electric soldering iron 





Round-nosed pliers 





Diagonal-blade nippers 





Tweezers 





Brush-Medium # 1 





Brush-Thin #2 





Phillips screwdriver No. 1 





ET holder #1.5 






O Commercially available 



3.5.2 Repair Procedures 

If of problem occurs, check its symptoms and status 
and clarify the source of the problem with reference 
to subsection 3.5.3, "Repair Guidelines" then repair 
the damaged area. Note that the tables of subsection 
3.5.K3, "Repair Guidelines", consist of the five items 
listed below, enabling troubleshooting and repair to 
be performed with speed and efficiency with minimum 
error. 

Phenomenon 

Check the symptoms of the trouble. 

Condition 

Compare the trouble status of the problem with the 
description in this column and locate the matching 
status. 



3.4.2 List of Lubricants 



Item 


Designation 


Volume 


Oil 


0-3 


40 gm 


Grease 


G-20 


40 gm 


G-34 


40 gm 



3.5 REPAIR 

In consideration of the level of expertise required for 
implementation of after-service and repair procedures 
for this printer, such procedures have been grouped 
into two rankings: Level A and Level B.The person in 
charge of repair, therefore, should perform the repair 
procedures appropriate to the repair level and to his/ 
her own level of expertise. 

3.5.1 Repair Levels 

LEVEL A: 

Requires general knowledge and technical skills 
regarding the operating principles and structure of the 
printer, but does not require previous repair 
experience. 

LEVEL B: 

Requires full knowledge and technical skills regarding 
the structure and operating principles of the printer 
as well as previous repair experience. 



Cause 

This columns lists the potential causes on the basis 
of the trouble status, allowing the location of the trouble 
to be checked. 

Check-Point & Method 

In correspondence to the cause, this column lists what 
parts to check as well as the checking procedure to 
be used. Be sure to inspect the check-points according 
to the method describe here. 

Repair Method 

Repair the trouble area according to the description 
in this column. If the identical phenomenon and 
condition remain unchanged after performing the 
rapair, check another item of the "Cause" column, then 
perform the relative repair. 

NOTE: 

If you wish to carefully check the operation of such 
parts as the gears, manually rotate the motor gear in 
the counter-clockwise direction to perform such check. 



68671 0D 



Service Manual 



3-5 



3.5.3 Repair Guidelines 



PHENOMENON 



CONDITION 



CAUSE 



LEVEL 



CHECK POINT AND 
METHOD 



REPAIR METHOD 



1 . Motor doesn't 
rotate. 



Motor doesn't 
rotate despite 
issuing of print 
istruction or its 
rotation becomes 
locked. 



(1) Defect of 
power input 
to motor. 



- Check the input 
power. Use a tester or 
oscilloscope to check 
the input voltage 
between the motor 
terminals. 



- Inspect and repair 
the power supply 
circuit. 



(2) Defective 
conductivity 
of jumper 
wire. 



- Check the 
conductivity between 
the motor terminals. 



- Perform resoldering 
or replace the jumper 
wire. 



(3) Locking of 
hammer and 
print wheel 
ass'y. 



- Manually rotate the 
motor gear and check 
whether the operation 
of the print wheel ass'y 
and other mechanisms 
is normal. 



Replace the hammer 



(4) Adhesion 
of foreign 
matter to the 
rotating 
mechanism 



(B) 



- Manually rotate the 
motor gear in the 
counter-clock-wise 
direction and check for 
the adhesion of foreign 
matter. Remove any 
foreign matter. 



- Remove any foreign 
matter. 



(5) Improper 
mounting 
position of 
the print 
changeover 
cam. 



- See Main Assembly 
B in the chapter 4 and 
check. 



- Properly re-position 
the print changeover 
cam. 



(6) Defective 
motor. 



- Check the above 
Cause (1) to (5) to see 
if they are applicable. 



Replace the motor. 



2. No column 
printing is 
performed. 



Motor rotates 
normally, but no 
printing is 
performed. 



(1) Defective 
conductivity 
of jumper 
wire. 



- Check the 
conductivity between 
across the terminals of 
detector ass'y and 
trigger coil. 



- Perform resoldering 
or replace the jumper 
wire. 



(2) Broken 
coil lead of 
trigger coil. 



- Measure the 
resistance value of the 
trigger coil. 
Rating: 20+/- 2 Ohm 
(at25°C). 



- Replace the triggle 
coil. 



3-6 



Service Manual 



68671 0D 



PHENOMENON 


CONDITION 


CAUSE 


LEVEL 


CHECK POINT AND 
METHOD 


REPAIR METHOD 


2. No column 


Motor rotates 


(3) Improper 


B 


- See CAUSE (5) of 


printing is 


normally, but no 


position of 




PHENOMENON ! 


performed. 


printing is 
performed 


print 

changeover 

cam. 






(4) Broken 


B 


- Remove the ink roll 


- Replace the hammer 






hammer 




ass'y and check if the 


transmission lever 






spring 




spring is broken. 


ass'y. 






(hammer 












transmission 












lever ass'y). 








(5) Faulty 


B 


- See Main Assembly 


- Properly engage the 






engagement 




A in chapter 4 and 


print cam and hammer 






between the 




check. 


spring. 






print cam and 






- If they easily become 






hammer 






disengaged, bend the 






spring 






hammer spring to 






(hammer 






ensure engagement. 






transmission 












lever ass'y). 








(6) Abnormal 


B 


- Check if the charge 


- Perform repair on the 






charge pulses 




pulsewidth are within 


circuit side. 






to the trigger 
coil. 




rated values. 




3. Incomplete 


Top, bottom or 


(1) Faulty 


A 


- Check if the platen 


- Properly re-mount it. 


printing. 


sides of printed 


mounting of 




ass'y is firmly mounted 






characters are 


the platen 




in the frame. 






missing. 


ass'y. 








(2) Wear to 


B 


- Manually set the 


- Replace any worn 






the print cam, 




trigger lever into drawn 


parts. 






hammer 




status, then perform a 








transmission 




printing operation to 








lever ass'y or 




check the hammer 








hammer. 




stroke. 




(3) Wear or 


B 


- Check the 


- Replace the 






adhesion of 




column-shift teeth of 


positioning plate. 






foreign 




the positioning plate 


- Remove any foreign 






particles to 




for wear and for the 


matter. 






positioning 




adhesion of foreign 








plate. 




matter. 




(4) Foreign 


A 


- Check if foreign 


- Remove particles. 






particles 




matter is adhered to 








adhered to 




front or back of the 








print wheel 




hammer tip and print 








ass'y or 




wheel. 








hammer. 









68671 OD 



Service Manual 



3-7 



PHENOMENON 


CONDITION 


CAUSE 


LEVEL 


CHECK POINT AND 
METHOD 


REPAIR METHOD 


3. Incomplete 


Top, bottom or 


(5) Stretched 


B 


- Check for stretching 


- Replace the print 


printing. 


sides of printed 


print wheel 




at the frame of the 


wheel ass'y. 




character are 


ass'y or worn 




print wheel and worn 






missing. 


characters. 




typefaces. 




4. Missing 


Missing characters 


(1) Defective 


A 


- See Main Assembly 


- Properly re-mount it. 


characters or 


occur in all 


mounting of 




B in chapter 4 and 




missing printing. 


columns. 
Printing of 


trigger lever 
spring. 




check. 




(2) Disengage 


A 


- Check the selecting 


- Replace the selective 




characters other 


or stretch of 




ratchet spring for 


pawl spring. 




than those that 


selective pawl 




disengaged or stretch. 






should be printed. 


spring. 








(3) Stretching 


B 


- Check the hammer 


- Replace the hammer 






of hammer 




spring for stretching. 


transmission lever 






spring of the 






ass'y. 






hammer 












transmission 












lever ass'y. 








(4) 


B 


- Return the print 


- Replace the print 






Malfunction 




wheel ass'y and 


wheel ass'y. 






of print wheel 




carriage to standby 








ass'y 




status and release the 
positioning plate. Next, 
manually slide the 
carriage to check if the 
print wheel ass'y slides 
smoothly. 




(5) Bent 


B 


- Check if the flange is 


- Replace the detector 






flange of the 




bent. 


ass'y. 






detector 












ass'y. 








(6) Foreign 


A 


- Check for the 


- If foreign particles 






particles 




adhesion of foreign 


are adhered, remove 






adhered to 




matter. 


them. 






the trigger 




- Check for the 








plate and the 




adhesion of paper 








trigger yoke 




dust. 








of the 












selective gear 












ass'y. 









3-8 



Service Manual 



68671 OD 



PHENOMENON 


CONDITION 


CAUSE 


LEVEL 


CHECK POINT AND 
METHOD 


REPAIR METHOD 


4. Missing 
characters or 
missing printing. 


Missing characters 
occur in all 
columns. 

Printing of 
characters other 
than those that 
should be printed. 


(7) Scratches 
or burrs on 
the trigger 
plate or 
trigger yoke 
section 
(selective 
gearass'y). 


B 


- Check the trigger 
plate and trigger yoke 
section for scratches 
and burrs. 


- Replace the trigger 
plate and/or selective 
gear ass'y. 


(8) Improper 
mounting 
position of 
the print 
gear. 


B 


- See Main Assembly 
A in the chapter 4 and 
check. 


- Properly re-mount it. 


(9) Defective 
carry ng. 


B 


-See PHENOMENON 
8. 


(10) Defective 

carriage 

return. 


B 


-See PHENOMENON 
8. 


5. Smudged or 
faint printing. 


Generation of 
smudged or faint 
printing 


(1) Improper 
position of ink 
roll ass'y. 


A 


- See Installation of 
Ink Roller Ass'y in 
chapter 2 and check. 


- Properly re-mount it. 


(2) Use of 
improper ink 
roll ass'y. 


A 


- Check if the specified 
ink roll ass'y is being 
used. Rated pulse 
width: IR40. 


- Properly re-mount it. 
Use only the specified 
part. 


(3) Stretching 
of the ink roll 
spring. 


A 


- Remove the ink roll 
ass'y to check if the 
springs stretched. 


- Replace the ink roll 
spring. 


(4) No ink 
supply. 


A 


- Check the ink supply 
status. 


- Replace the ink roller 
ass'y 


(5) Wear to 
the print cam, 
hammer 
transmission 
lever ass'y 
and hammer. 


B 


- See CAUSE (2) of 
PHENOMENON 3 


(6) Dirt 
adhered to 
the print 
wheel ass'y or 
platen ass'y. 


A 


- Check for the 
adherence of ink 
clumps, paper dust, 
etc. 


- Remove any dirt. 



68671 0D 



Service Manual 



3-9 



PHENOMENON 


CONDITION 


CAUSE 


LEVEL 


CHECK POINT AND 
METHOD 


REPAIR METHOD 


5. Smudged or 


Generation of 


(7) Bent 


A 


- From the top of the 


- Repair the metal 


faint printing. 


smudged or faint 


platen ass'y 




printer, check if the 


section or replace the 




printing 


(the metal 
section at the 
paper outlet). 




platen ass'y is bent. 


platen ass'y. 


6. Paper is not 


The motor rotates 


(1) Defective 


A 


- See CAUSE (2) of 




fed. 


normally, but 
paper not fed. 


conductivity 
of jumper 
wires. 




PHENOMENON 1. 




(2) Broken 


B 


- See CAUSE (2) of 








coil lead or 




PHENOMENON 2. 








trigger coil. 








(3) Abnormal 


- 


- See CAUSE (6) of 








charge pulses 




PHENOMENON 2. 








to the trigger 












coil. 








(4) Foreign 


A 


- Check the paper 


- Remove any foreign 






matter has 




guide path. 


matter. 






entered the 












paper guide 












of the platen 












ass'y. 








(5) Worn or 


B 


- Manually set the 


- Replace any faulty 






scratched 




trigger lever to drawn 


parts. 






paper feed 




status then feed the 








gear train. 




paper to check if any 
of the below gears are 
scratched or worn. 
- Paper feed ratchet 
wheel, paper feed 
drive gear ass'y, paper 
feed transmission 
gear, or paper feed 
gear. 




(6) Loose or 


A 


- Check if the platen 


- Properly re-mount 






damaged 




ass'y is improperly 


the platen ass'y or 






paper hold 




mounted and if the 


replace it. 






roller in the 




paper hold roller is 








platen ass'y. 




damaged. 




7. Uneven paper 


The line spacing 


(1) Use of 


A 


-Check that the 


- Use the spacified 


feeding pitch. 


of printed 


improper 




specified paper is 


paper. 




character is 


paper. 




being used. Standard: 






uneven 






See subsection 2.2 
Specification. 





3-10 



Service Manual 



68671 0D 



PHENOMENON 


CONDITION 


CAUSE 


LEVEL 


CHECK POINT AND 
METHOD 


REPAIR METHOD 


7. Uneven paper 
feeding pitch. 


The line spacing 
of printed 
character is 
uneven. 


(2) 

Processing 
installation of 
the platen 
ass'y. 


A 


- See CAUSE (1) of 
PHENOMENON 3. 


(3) Defective 
platen ass'y. 


B 


- Check the paper 
feeding rubber for 
wear. 


- Replace the platen 
ass'y. 


(4) Defective 
paper feed 
drive gear 
ass'y. 


B 


- Check if any of the 
internal springs are 
bent. 


- Replace the paper 
feed drive gear ass'y. 


(5) Wear or 
damage to 
the gears. 


B 


- See CAUSE (5) of 
PHENOMENON 6. 


(6) Defective 
supplying of 
paper. 


A 


- Check the paper 
supply path for 
obstructions. 


- Repair each paper 
supply mechanism. 


8. Defective 
carrying. 


The carriage does 
not perform 
carrying. 


(1) Wear of 
the trigger 
lever. 


B 


- Check the trigger 
lever for wear 
(interlocking section 
with selecting ratchet). 


- Replace the trigger 
lever. 


(2) Wear of 
the selective 
pawl. 


B 


- Check the selective 
pawl for wear. 


- Replace the seective 
pawl. 



68671 OD 



Service Manual 



3-11 



PHENOMENON 


CONDITION 


CAUSE 


LEVEL 


CHECK POINT AND 
METHOD 


REPAIR METHOD 


8. Defective 


The carriage does 


(3) Wear or 


B 


- Check each part for 


- Replace the print 


carrying. 


not perform 


broken teeth 




wear and missing 


cam and positioning 




carrying. 


of the print 
cam and 
positioning 




teeth. 

/4 


plate. 






plate. 














^^>. / 












^^%^ 












. 








(4) Abnormal 


- 


- Check the circuit to 


- Perform repair on the 






input pulse to 




see if the pulsewidth 


circuit side. 






the trigger 




of the carrying charge 








coil. 




pulses is correct. 




(5) 


B 


- With the positioning 


- Replace the return 






Malfunction 




plate in its unlocked 


spring. 






of the 




status, check for 


- Remove any foreign 






positioning 




stretching of the return 


matter. 






plate. 




lever spring and for 
foreign matter adhered 
between the 
positioning shaft and 
positioning plate. 




9. Defective 


The carriage 


(1) Wear of 


B 


- Check the return 


- Replace the return 


carriage return. 


doesn't return. 


the return 
lever. 




lever for wear. 


lever. 












c/ 








(2) Stretching 


A 


- Check the return 


- Replace the return 






of the return 




lever spring for 


lever spring. 






lever spring. 




stretching. 




(3) Stretching 


B 


- Check the carriage 


- Replace the faulty 






of the 




spring and print wheel 


part. 






carriage 




spring for stretching. 








spring and 












print wheel 












spring. 









3-12 



Service Manual 



68671 OD 



PHENOMENON 


CONDITION 


CAUSE 


LEVEL 


CHECK POINT AND 
METHOD 


REPAIR METHOD 


9. Defective 
carriage return. 


The carriage 
doesn't return. 


(4) Wear of 
the point 
where the 
cam section 
of the 
positioning 
plate contacts 
the frame. 


B 


- Check the point 
where the cam section 
of the positioning plate 
contacts the frame. 

V 


- Replace positioning 
plate. 


(5) Abnormal 
input pulse to 
the trigger 
coil. 




- Check the circuit to 
see if the pulse width 
of the return charge 
pulses is normal. 


- Perform repair on the 
circuit side. 


(6) Carriage 
malfunction. 


A 


- Check if dirt has 
adhered to section 
where the carriage 
rubs against the print 
wheel ass'y 


- Remove any dirt. 



Connection 



Trigger magnet ( — ) 



Pin No. 



i a- 



NOTE: The printer detector side 
is regarded as "V 



-TWF 



Trigger magnet ( ■+ ) 



2 O 



Motor ( + ) 



Motor (-) 



3 O- 



40 



<^> 



Common C 



Sub-Timing signal t 



50 



60 



o 



80 



Fig. 3-6 Pin Assignment Diagram 



68671 OD 



Service Manual 



3-13 




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3-14 



Service Manual 



68671 OD 



4. ASSEMBLY AND DISASSEMBLY 
4.1 GENERAL 

• Assembly and Disassembly are performed using procedures described in figure 4-1. 

• The presence in the assembly procedure column of a "@' mark signifies that a <CHECK> is necessary; the 
presence an "3" in the assembly procedures means there is a <DISASSEMBLY POINT> in the Assembly 
Points. It will be useful to refer to Assembly Points to confirm reassembling methods of reassembling as the 
components are disassembled. 

• Underlined words in the Reassembly Step indicate that lubrication is required before fiting that component and 
that such lubrication would be very difficult if attempted after fiting is completed. 

• Adetailed description of lubrication, including points requiring lubrication upon completion of assembly, is given 
in section 3.3.3, "Lubrication Points". Perform lubrication also with reference to Fig. 4-2, "Lubrication Points" 
at the back of this Chapter. 

• Small parts are all represented by abbreviations. 

List of Abbreviations for Small Parts 



Symbol 


Designation 


Standard 


S-1 
S-2 
R-1 
R-2 


Cup screw 
Cup screw 

Retaining ring TYPE-E 
Retaining ring TYPE-E 


M2 x 2.9 
M2 x 3.5 
1.2 
1.5 



Actual Size of Small Parts 



R-1 (12) R-2 (1.5) 



68671 OD 



Service Manual 



4-1 



4.2 MACHINE DISASSEMBLY - REASSEMBLY 
4.2.1 Machine Case 

Disassembly 

• Unplug the machine power cord from the electrical wall outlet. 

• Push the case of the machine (1 ) in the direction of the arrow (2). 

• Remove the case (1) by lifting it the direction of arrow (3). 

Reassembly 

• Correctly position the case on the machine (1 ). 

• Push the case (1) in the direction of arrow (4). 

• Plug the machine power cord into the electrical wall outlet. 




4.2.2 Printer Unit 

Disassembly 

• Remove the printer compartment cover (1). 

• Remove the machine case (2). 

• Disconnect connector (3). 

• Using a screwdriver, remove screw (4) that secures the paper support (5) and remove this support. 

• Remove the printer (6) in the direction of the arrow shown being careful to avoid damaging the connection 
cables. 



Reassembly 

• Correctly position the printer (6) as shown in the figure. 

• Correctly position the paper support (5) and tighten its related securing screw (4). 

• Reattach the connector (3). 

• Refit the case of the machine (2) and the printer compartment cover (1 ). 





4-2 



Service Manual 



68671 OD 



4.2.3 Main Board and Display 

Disassembly 

• Remove the machine case. 

• Disconnect the printer connector (1 ). 

• Disconnect the paper feed motor connector (2). 

• Disconnect the keypad connectors (3). 

• Disconnect the battery supply connectors (4). 

• Disconnect the drawer open control mechanism connector (5). 

• Disconnect the power supply connector (6). 

• Using a screwdriver, remove the securing screws (7). 

• Remove the main board (8). 

Reassembly 

Perform the disassembly procedure in reverse order. 




4.2.4 Paper Feed Motor 

Disassembly 

• Remove the machine case. 

• Disconnect the motor power supply connector (1 ). 

• With a screwdriver, remove securing screws (2). 

• Remove motor (3) with its related support (4). 

Reassembly 

• Correctly position motor (3). 

• Tighten securing screws (2). 

• Reconnect the motor power supply connector (1 ). 

• Refit the machine case. 




68671 OD 



Service Manual 



4-3 



4.2.5 Power Supply 

Disassembly 

• Remove the machine case. 

• Disconnect the power supply - main board connector (1a) and the drawer open mechanism - main board 
connector (1b). 

• Slightly pull back the protection sheath (2). 

• Using the appropriate tool, cut the junctions between the power cord (3) and the power supply cables. 

• Remove the power supply securing screws (4). 

• Remove the power supply (5). 



Reassembly 

• Correctly position the power supply (5) into its seat. 

• Tighten the securing screws (4). 

• Using the appropriate tool, restore the connections that were previously cut. 

• Replace the protection sheaths (2). 

• Reconnct the power supply - main board connector (1) and the drawer open mechanism 
connector. 

• Refit the machine case. 

,2 

3 



main board 




4.2.6 Keypad 

Disassembly 

• Remove the machine case. 

• Disconnect the keypad - main board connectors (1). 

• Using a screwdriver, remove securing screws (2). 

• Remove the keypad (3) together with the machine's ON/OFF switch (4). 

Reassembly 

• Correctly position the keypad (3) and the ON/OFF switch (4). 

• Tighten the securing screws (2). 

• Restore connection (1). 

• Refit the machine case. 




4-4 



Service Manual 



68671 OD 



4.3 PRINTER DISASSEMBLY - REASSEMBLY 

4.3.1 Ink Roller 

• Grasp the tab of the ink roller and lift it out of its slot. 



Ink roll ass'y 




Refitting the Ink Roller 

• Position the ink roller in its slot and then press it until it snaps into place. 



68671 OD 



Service Manual 



4-5 



4.3.2 Electrical Connections 

Disconnecting 

• With the appropriate tool, cut the electrical connections and remove the connection cables. 



Jumper wires 



(Detection brush) 




Rubber (tiling 



Reconnecting 

• With the appropriate tool, restore the electrical connections that were previously cut. 



Jumper wires 




4-6 



Service Manual 



68671 OD 



4.3.3 Return Spring 

Disassembly 

• Using the appropriate tool, release the spring at its ends and remove it. 



Return lever --" | f 



Frame 




Return lever spring 



Positioning plate 



Reassembly 

• Position the spring and hook it in place by placing its ends into the corresponding slots. 



4.3.4 Snap Ring 

Disassembly 

• Using tweezers, remove the snap rings from the gears. 



Reduction gear 




Reassembly 

• Position the snap ring in place and secure it using tweezers. 



68671 OD 



Service Manual 



4-7 



4.3.5 Gear 



Disassembly 

• Being careful to avoid loosing and/or damaging any part, remove the printer reduction gear - movement 
assembly as shown in the figure. 



Motor gear 



T side 

PrinI changeover cam 
Planet gear (a) 

Selective drive gear (b) 

Reduction gear (c) 

^ R-i 
I ^ 

JO Return lever spring 

Trigger le'ver ^^fe-c^ Tr ' 9fler pla,e spring 
spring / ^^V^-, Trigger coil 

Trigger lever ^GS ^^^^ Selective gear assembly 
Paper feed transmission gear Trigger plate f /SflWoJ 

M side 

B 8 R-2 

Chamfered side 




Paper feed— m(§^ 
drive gear assy 





J 



Reassembly 

• Fit onto the print wheel shaft. 

• Fit onto the paper feeding transmission gear shaft. 

• Fit onto the positioning shaft. 

• Assemble the trigger lever and trigger lever spring, then fit the assembled piece onto the print wheel shaft. 

• After aligning the trigger lever with the stage-change section of the return lever, attach the hook of the trigger 
lever spring to the groove in the paper feed transmission gear shaft. 

• Fit the positioning shaft then engage it with the selective pawl spring. 




Trigger lever spring 



Trigger lever spring 




Trigger lever 



Paper feed transmission gear shaft 



Paper feed 
transmission 
gear shaft 

Hook of trigger 




nge section 



Trigger lever 



Return lever 



4-8 



Service Manual 



68671 OD 



@ CHECK 

• Check that its phase matches the trigger lever phase. 



Selective pawl Selective pawl spring 
Trigger lever Return lever 




Phase 



Engaged 



Make sure that the phase of the print gear is properly aligned. 

Fit the print changeover cam so that the stopper of the selective pawl spring engages with the cam track on 

the outer periphery of the print shift cam. 



Print changeover cam 




Cam track 



Selective pawl spring 



• Make sure that the chamfered side faces outward. 

• Fit onto the print wheel shaft and paper feeding transmission gear shaft. 

• While matching the three dowels of the trigger lever to the openings of the trigger plate, press the opposite end 
of the print wheel shaft and press on the selecting gear assembly, then secure it with R-2. 

• Push the tip of the print wheel shaft from the T side toward the T side so that the selective gear assembly 
contacts R-2. 

@ CHECK 

• Before re-fiting the selective gear assembly during parts replacement or other occasions, make sure that the 
detection wheel and detector assembly have been removed (otherwise, the detection wheel and detector 
assembly may be damaged). 

• Assemble parts a through c, fit the assembled piece onto the reduction shaft, then secure by R-1 . 



68671 OD 



Service Manual 



4-9 



4.3.6 Motor 

Disassembly 

• Using a screwdriver, remove the securing screws. 

• Remove the selection lever, related spring and then remove the motor. 



Selective pawl spring holder 
Motor 



Tab 




Tab 



Selective pawl spring 




Reassembly 

• Fit the motor with the round hole on its screw-hole side closest to the bottom, then secure section E by screw. 

• Fit the spring onto the tab on the M side of the frame assembly. 

• Fit the selective pawl spring holder, then secure by screw in the position where the selective pawl spring holder 
contacts the outer periphery of the motor shaft holder (~). 



4-10 



Service Manual 



68671 0D 



4.3.7 Detection Wheel 

Disassembly 

• Remove the detector assembly with related brushes. 

• Slide the wheel off the guide shaft. 



(Detection brush) 



T side 




/ 
Guide shaft 



Rubber lining 



Reassembly 

• Align the blank character of the print wheel with the print position of the platen. 

• The rotation of the print wheel causes the motor gear to rotate in the counter-clockwise direction. 



Blank character 



\ 



1 2 



• Press the detection wheel onto the print wheel shaft. 

@ CHECK 

• Position the R pattern of the detection wheel towards the upper left diagonal direction. 

R pattern direction 




• Pass the shaft along the track in the carriage from the frame T side to the frame M side. 

• Match the tabs of the detector assembly to the related positions of the frame assembly, then fit the detector 
assembly. 

@ CHECK 

• Make sure you do not deform the detection brush of the detector assembly. 

3 DISASSEMBLY POINT 

• To remove the detector assembly, release the hooks. 



68671 OD 



Service Manual 



4-11 



4.3.8 Platen Assembly Removal 

• Remove the assembly in the direction of the arrow and lift it off. 



Platen assembly 




Frame assembly 



Fit section C of the platen assembly into the frame assembly, then press the platen assembly in the ~~ ' arrow 
direction. 



Platen assembly 




Frame assembly 

@ CHECK 

• Make sure there is no gap between the platen assembly and frame assembly (at the section indicated by). 



n 



Platen assembly 



Sj. 



Frame assembly 

3 DISASSEMBLY POINT 

• To remove the platen assembly, insert tweezers into the gap between the bottom of the platen assembly and 
the frame assembly and then release section D. 



Platen assembly 




Frame assembly 



Insert tweezers here 



4-12 



Service Manual 



68671 OD 



4.3.9 Printer Carriage 

Removal 

• Release the printer carriage spring from the structure and then slide the carriage off. 



Carriage unit 
^ (Carriage spring) 




Reassembly 

• Fit the carriage unit onto the frame assembly, making sure not to squash the carriage spring. 

• Hook the carriage spring to section B of the frame assembly. 

• Fit the print gear onto the print shaft. 

• Pass the print shaft through the carriage unit from the M side of the frame assembly, engage the print cam 
and the hammer spring, then align the phase of the print gear so that its cam section is at the bottom. 



Print cam 



Hammer spring 




<> 




Print gear 



Engaged 



Cam section 



68671 OD 



Service Manual 



4-13 



4.3.10 Printer Carriage 

Disassembly 

• Remove the paper feed wheel and then remove the R-2 ring from its position A. 

• Remove the spring. 

• Remove the printer shaft. 



f 




-V/A 



J 



HD 



Print wheel spring 



Paper feed ratchet wheel 



Remove the ink roller securing spring from the carriage. 




Ink roll spring 




Carriage 



Remove the hammer return spring. 




Carriage 



Hammer return spring 



Hammer 



Remove the print wheel assembly - hammer from the carriage. 



Print wheel assembly 

Hammer 




Carriage 



4-14 



Service Manual 



68671 0D 



Reassembly 

Fit the hammer onto the print wheel assembly, then fit the assembled piece in the carriage. 

Fit from the bottom of the carriage. 

Attach the spring to the hammer and the carriage. 

Make sure you fit the ink roll spring so that it is properly oriented. 

Secure R-2 to section A of the print wheel shaft, then fit the print wheel spring and paper feed ratchet wheel. 

Pass the shaft through the hammer and print wheel assembly which the print wheel are fited onto the carriage. 



Hammer return spring 



Prim wheel shaft 

•4 



Ink roll spring 



Hammer transmission lever assembly 




Print wheel assembly 



Paper feed ratchet wheel 



68671 OD 



Service Manual 



4-15 



4.3.11 Machine Case 

Disassebly 

• Remove the positioning shaft with related positioning plate. 

• Remove the mounting rubber. 




Positioning plate 
v3jc3 — (Mounting rubber) 



(Mounting rubber) 



Frame assembly 



(Mounting rubber) 

Reassebly 

• To reassemble follow the disassembly procedure in reverse order. 



4-16 



Service Manual 



68671 OD 



tr* 




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at 

c 
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— M — CM 

1/1 VI C C 



F/g. 4- 7 Exploded View 



68671 OD 



Service Manual 



4-17 




Fig. 4-2 Lubrification Points 



4-18 



Service Manual 



68671 OD 



5. CIRCUITRY 



5.1 GENERAL 

The terminal uses a 8-bits single chip microcomputer The CPU has 24K bytes of internal ROM and 51 2 bytes of 
internal RAM , and used 2K bytes S-RAM of external memory. The terminal also has a battery-backed up clock 
that keeps track of the month, day of the week, date, hour and minute. 

5.1.1 Block Diagram 





4.0MHz 


32.768KHz 




Clock 




Clock 






V 




V 






Printer Unit Model-42V 






Main CPU 
M38123M6-xxxFP 
24K bytes ROM 
512 bytes RAM 




9digits Rear Display 






<; 


Solenoid 
Driver 






A 


A 








Segment 


9digits Front Display 










? 






Motor 
Driver 






A 








Display Digit, Key ccan strobe 


















-s 


Wave 
Fomer 




Key scan 










return 


Modelock 

t 




















*s 






V 








Key scan 
return 


Keyboard(9x4 matrix) 
Feed key 






















2K bytes 
S-RAM 


DO - D7 












Buzzer 






AO - A12 


















Drawer 
Sol. Driver 






WE.OE.CE 


? 














(Printer) 




) 


V i 


\ 








+ 17V +P6V VCC VBB 




Reset 






T T T T 












Power supply 


Power Fail 






















Dry Batter, 

























68671 OD 



Service Manual 



5-1 



5.2 POWER SUPPLY CIRCUIT 

+17V 

+6 V, the printer motor voltage, is generated using the 
1 5.6 VAC input across Pins 1 and 2 of CN5. This AC 
voltage is rectified by the bridge rectifier and filtered 
by EC3, a4700uF capacitor. The resulting DC voltage 
is about +1 7 V. 

+6V 

The circuit generating the +6 V uses the 1 7 V. It applies 
to the collector of T10, a D837B transistor. It is also 
dropped across R26, a 2.2 KOhm resistor, and D24, 
rated at 6.8 V. This provides a bias voltage of about 
6.8 VDC on the base of T5. This output voltage is 
filtered by capacitor EC4 and supplied to the emitter 
of transistor T5. This voltage is used by the printer. 



+5V 

The circuit generating the +5 V uses the 1 7 V. It applies 
to the collector of T6, a C3242A transistor. It is also 
dropped across R27, a 2.2 KOhm resistor, and D25, 
rated at 6.2 V. This provides a bias voltage of about 
6.2 VDC on the base of T6. This output voltage is 
filtered by capacitor EC5 and supplied to the emitter 
of transistor T6. This voltage is through the D15diode, 
output voltage is 5.3 V 

-30 V 

The -30 V circuit uses 27.5 VAC across Pins 3 and 4 
of CN5. This AC voltage is rectified by D5, a diode, 
and filtered by EC2; output voltage is approximately - 
30V DC. This voltage is used by the display. 

Filament Voltage 

The filament voltage F1 .F2 is used by the display tube. 
Its AC input is 4.0 V, and uses a ground reference -25 
V from the -30 V circuit dropped across R28, R30, an 
470 Ohm resistor. 



"X 



vv 






s 



m ±ti 



H'_ 



-a- 



*i 



Me 



5-2 



Service Manual 



68671 0D 



5.3 TRANSFORMER WIRING DIAGRAM 

FUSE 

250V T 100mA 



CT-63E 





1 






2 






1 








3 


2 






3 
4 
















5 




4 

5 






6 










6 













AC230V 
50Hz 

5.4 POWER SUPPLY SPECIFICATIONS 



Input - Power Consumption 

Standing by: Maximum 9 Watts 
Printing: Maximum 16 Watts 

Output - Rated Voltage 

+5V to GND 

Voltage: 5 V +/- 0.25 V 

Ripple: Less than 0.4 V p-p 

Stability: Line regulation - less than 0.3 V 
Temp, regulation - less than 0.3 V 

+6V to GDN 

Voltage: 6.0 V +/- 0.5 V 
Ripple: Less than 1 .0 V p-p 

Stability: Line regulation - less than 1 .0 V 
Temp, regulation - less than 1 .2 V 

-30 to GDN 

Voltage: -30 V +/- 2.0 V 
Ripple: Less than 5.5 V p-p 

Stability: Line regulation - less than 8.5 V 
Temp, regulation - less than 2 V 



F1 to F2 

Voltage: 
Stability: 



4.0 +/- 0.2 Vac 
Line regulation 



less than 1.0 V 



Standing by 
Printing 

Viae -10% to +10% 
Temp. 0<€ to 40°C 



Standing by 

Printing 
Viae -10% to +10% 
Temp. 0<€ to40°C 



Standing by 

Standing by 
Viae -10% to +10% 
Temp. 0<€ to40 °C 



Viae -10% to +10%. 



68671 0D 



Service Manual 



5-3 



5.5 RESET CIRCUIT 

The reset circuit prevents the CPU from starting to operate before the system is fully powered-up and initialized. 
Then 2uS after power is applied, reset goes high and the CPU can begin functioning. 
When power is first applied to the circuit, the VBB begins charging EC1 , a capacitor. While EC1 is charging. 
Once EC1 is fully charged, the voltage drops across the capacitor. 




5.6 POWER FAIL CIRCUIT 

Power fail is generated by a circuit using the +6 V voltage. 

When power is on and the system is operating normally, the power fail signal stays at a high level. 



+6V 

A 



D11 
HZ5C-3/RD5.6EB1 



VBB 
O 



4.7K 



A^A- 



R15 



4.7K 



AAA 




R1E 
470 



T3 
2SC5395 



T2 
2SA1993 



C14 
0.0 1u 



R18 
4.7K 



5-4 



Service Manual 



68671 OD 



5.7 DISPLAY CIRCUIT 

Display control is done by timer interrupt routine of CPU. Cycle of the timer is about 680 usee. POO through 
P07.P23 indicates scan signal of displayed digit and displayed digit of scan is done from G1 to G1 and each digit 
is turned on sequentially. 

P1 through P1 7,P22 indicates segment signal and these are connected to each segment of the digit. Along with 
Segment signal and Grid signal, High level segment is turned on. I/O port of the CPU, which controls Segment 
and Grid, is high-voltage port and directly drives fluorescent display. High-voltage port is special I/O port designed 
for fluorescent display and VEE level (-30 V) will be output as a low level. 
Front display and Rear display are connected in parallel. 



REAR DISPLAY 11-LT-13G 



VEE 



POO 

P01 

P02 

P03 

P04 

P05i 

P06 

P07 . 

P23* 



R35 
AAA- 



. F1 
F2 



-30V 



FRONT DISPLAY 10-LT-50G 



1.2 

38,39 



13,26 
a b c d e f g . - 9G 8G 7G 6G 5G 4G 3G 2G 1G 



56 7 8 9UI'i:i' 27 2E 2£ 3C 31 32 3; 3^ 3J 



-30V 
J 



R55 



. F1 
F2 



-30V 



68671 0D 



Service Manual 



5-5 



5.8 DISPLAY TUBE INFORMATION 



8.8.8.8.8.8.8.8.8.8 

G10 G9 G8 G7 G6 G5 G4 G3 G2 G1 

G1-G7 AMOUNT 

G8 REPEAT/DEPT# Clerkl (G9) 

G9 SIGN/DEPT# -Clerk6 (G4) 

G10 NOT USED 



Display Symbols 

Discount 

Minus amount Error Change Total Subtotal Prg. mode 

- E C = S P 



Display specification 

- Display tube front 10LT-50G 

rear 11LT-13G 

- Character size front 4 mm (H) x 4.9 (W) 

rear 12 mm (H) x 3.4 (W) 



5-6 Service Manual 68671 OD 



5.9 KEYBOARD CIRCUIT 

Keyboard scan is done by CPU interrupt routine as same as one for display. POO through P07, P23 are commonly 
used with scan signal displayed by Strobe line. P54 through P57 are return line of Keyboard matrix. 

It is consist of matrix of strobe line (8) x Return line (4) and total of 32 keys are assigned. 

In order to remove chattering, key entry is confirmed when two sequential entry of a key. 

P25 is used for Mode lock switch, Feed key. Mode lock switch is connected to strobe line (POO through P04), Feed 
key is connected to P07. 



-0 Q- 

-0 0- 

-0 0- 

-0 0- 

-0 0- 



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:?£ 



68671 OD 



Service Manual 



5-7 



5.10 PRINTER CIRCUIT 

Motor 

The printer motor is activated using the signal P51 from the CPU. 
This signal is normally low, and goes high to cause the motor to run. 

Printer Magnets 

The signals P50 from the CPU are the input for the printer magnets. 
These normally low signals drop high with a print signal. 

Timing Signal 

The printer generates, through the use of a mecanical switch assembly, a timing signal that is returned to the CPU 

through the INT1 line. 

A secter wheel passes through the nor gate M2, creating a square wave. 

The CPU uses this signal from the printer as the basis for timing the printer magnet signals, the motor drive and 
feed. 




P55 



P54 



P41/INT1/2CR 



P44/CNTRO 



P27 



5-8 



Service Manual 



68671 0D 



5.11 DRAWER CIRCUIT 



5.13 BUZZER CIRCUIT 



The drawer is activated using the signal P26 from the 
CPU. This signal is normally low, and goes high to 
cause the drawer to run. When P26 is high, T9 is on. 
Current flow through the transistor cause the collector 
to be held low, near high potential. 

+17V 

A 



cm 



1 

3 



D12 
RL102-E 



DRAWER 




'W^ 



R22 



4.7K 



5.12 BATTERY CIRCUIT 

When the +5 V supply starts dropping, as in a power 
fail condition, the voltage through the divider network 
drops accordingly. 

When +5 V novoltage, D1 7 is shut off current B+5 V 
is through the D20 and D21 from battery. 



The buzzer circuit uses signal P24 from the CPU. 
This normally low signal goes high on 2 conditions. 
First, on a error tone, P24 goes high until the error 
condition is cleared. For a key entry tone, P24 goes 
high and then returns to its low state. This pulse is of 
extremely short duration. 



+ 17v 



BUZZER 




-N/V^ 



When the voltage at +5 V has dropped, voltage back- 
up is provided by the battery. 

The battery voltage B+5V goes to the CPU and 
external RAM. 

Battery specification: 

Type: SUM-3 x 4 

Voltage: 6.0 V 
Rating: 500 mAh 




SUM 3x4 



68671 0D 



Service Manual 



5-9. 



SCHEMATIC AND DIAGRAM 



TTTTTTTTT 

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220V Model 




68671 1S 



Service Manual 



6-1 




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6-2 



686711 S 



SPARE PARTS CATALOGUE 



IMPORTANT 

THIS PUBLICATION IS WRITTEN BY OLIVETTI LEXIKON (SPARE PARTS DEPARTMENT). 
THIS CATALOGUE IS THE ONLY DOCUMENT TO WHICH REFERENCE MAY BE MADE 
FOR ORDERING SPARE PARTS. 



686711S Spare parts catalogue 



EXPLODED PARTS 



CMS 140 



REF. 



CODE 



DESCRIPTION 



1 


1 28703 B 


MAIN BOARD 


2 


1 28704 C 


LSI 225 CX- M38123 M4 


3 


1 28705 D 


DISPLAY 10 LT-50G 


4 


1 28839 T 


COMPLETE KEYBOARD ASSY 


5 


128707 F 


TRANSFORMER 


6 


1 28708 Q 


AC CORD AOBA EP307 


7 


1 28709 R 


PRINTER END CASSETTE KEY 


8 


128710 D 


MOTOR 


9 


128711 S 


PRINTER M42 - V 


10 


1 28834 N 


CASSETTE 


11 


1 28835 P 


COVER ASSEMBLY 


12 


1 28836 Q 


PRINTER COVER 


13 


1 28837 R 


FRONT COVER 


14 


1 28838 S 


DEPOSIT DRAWER 


15 


128717 Y 


WINDING REEL 



Spare parts catalogue 



68671 1S 



EXPLODED PARTS 



CMS 140 




68671 1S 



Spare parts catalogue 



A - 3 



EXPLODED PARTS 



CMS 240 



REF. 



CODE 



DESCRIPTION 



417168 U 
128718 H 



MAIN BOARD 115V 
MAIN BOARD 220V 



2 


1 28704 C 


LSI 225 CX- M38123 M4 


3 


1 28705 D 


DISPLAY 10 LT-50G 


4 


128721 U 


DISPLAY 11 LT- 13G 


5 


1 28722 V 


FRONT SUPPORT 


6 


1 28723 W 


REAR SUPPORT 


7 


128710 D 


MOTOR 


8 


1 28707 F 


TRANSFORMER 


9 


1 28708 Q 


AC CORD AOBA EP307 


10 


1 28840 G 


CASSETTE 


11 


1 28709 R 


PRINTER END CASSETTE KEY 


12 


1 28842 W 


PRINTER COVER 


13 


128717 Y 


WINDING REEL 


14 


128711 S 


PRINTER M42 - V 


15 


1 28843 X 


FRONT COVER 


16 


1 28844 Y 


DEPOSIT DRAWER 


17 


128841 V 


COVER ASSEMBLY 


18 


1 28845 Z 


COMPLETE KEYBOARD ASSY 



Spare parts catalogue 



68671 1S 



EXPLODED PARTS 



CMS 240 




68671 1S 



Spare parts catalogue 



A - 5. 



UPDATING STATUS 



DATE 


UPDATED PAGES 


PAGES 


CODE 


11/1998 


1 st EDITION 


65 


68671 0D-00 


09/1999 


1 st NEWSLETTER 


15 


68671 1S-00